06.深入浅出 Spring Boot - 数据访问之Druid（附代码下载）

<!-- Druid -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.21</version>
</dependency>

type: com.alibaba.druid.pool.DruidDataSource

    # druid 配置
    dbType: mysql   # 指定数据库类型 mysql
    initialSize: 5  # 启动初始化连接数量
    minIdle: 5      # 最小空闲连接
    maxActive: 20   # 最大连接数量（包含使用中的和空闲的）
    maxWait: 60000  # 最大连接等待时间 ，超出时间报错
    timeBetweenEvictionRunsMillis: 60000  # 设置执行一次连接回收器的时间
    minEvictableIdleTimeMillis: 300000   # 设置时间： 该时间内没有任何操作的空闲连接会被回收
    validationQuery: select 'x'         # 验证连接有效性的sql
    testWhileIdle: true             # 空闲时校验
    testOnBorrow: false  # 使用中是否校验有效性
    testOnReturn: false  # 归还连接池时是否校验
    poolPreparedStatements: false  # mysql 不推荐打开预处理连接池
    #   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,log4j # 设置过滤器 stat用于接收状态，wall防止sql注入，logback说明使用logback进行日志输出
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true # 统计所有数据源状态
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500 # sql合并统计 设置慢sql时间为500，超过500 会有记录提示

package com.jackson0714.springboot.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class DruidConfig {

    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid() {
        return new DruidDataSource();
    }

    // 配置Durid监控
    // 1、配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet() {
        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map<String, String> servletInitParams = new HashMap<>();
        servletInitParams.put("loginUserName", "Admin");
        servletInitParams.put("loginPassword", "abc123");
        servletInitParams.put("deny","192.168.10.160"); // 拒绝访问
        servletInitParams.put("allow",""); // 默认允许所有
        servletRegistrationBean.setInitParameters(servletInitParams);

        return servletRegistrationBean;
    }

    // 2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());

        Map<String, String> filterInitParams = new HashMap<>();
        filterInitParams.put("exclusions", "*.js,*.css,/druid/*");// 不拦截js、css文件请求，不拦截/druid/*的请求
        filterRegistrationBean.setInitParameters(filterInitParams);
        filterRegistrationBean.setUrlPatterns(Arrays.asList("/*")); // 拦截所有请求

        return filterRegistrationBean;
    }
}

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to bind properties under 'spring.datasource' to javax.sql.DataSource:

    Property: spring.datasource.filters
    Value: stat,wall,log4j
    Origin: class path resource [application.yml]:23:14
    Reason: org.apache.log4j.Logger

Action:

Update your application's configuration


Process finished with exit code 1

<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.17</version>
</dependency>

servletInitParams.put("loginUsername", "Admin");
servletInitParams.put("loginPassword", "abc123");